Received: 21 January 2021
Accepted: 2 October 2021
First Online: 25 October 2021
: The study was registered with the National Medical Research Register and was approved by the institutional review boards of the Medical Research Ethics Committee of Ministry of Health Malaysia (NMRR-20-1120-55048 (IIR)).
: All authors have given verbal consent for publication.
: The authors declare that they have no competing interests.